OSHA electrical safety-related work practices in general industry (29 CFR 1910 Subpart S, 1910.331-1910.335): deenergizing, qualified persons, lockout and verification, overhead lines, conductive items, working space, training and alerting techniques. Free practice quiz with instant feedback; every explanation cites the 29 CFR paragraph it is based on. Independent review material: not affiliated with or endorsed by OSHA, not an OSHA Outreach (10/30-hour) exam, and it does not replace the training and evaluation your employer must provide.
Pergunta 1 · Escolha única · 90s · 1 pt
Under OSHA's electrical work practice rules, what is the default for live parts an employee may be exposed to?
- Work on them live, with rubber gloves
- Cover them with electrical tape and carry on working
- Work on them only during the night shift
- Deenergize them before work on or near them
Pergunta 2 · Escolha única · 90s · 1 pt
Which reason does OSHA accept for NOT deenergizing before work?
- The job will take less than ten minutes
- Deenergizing would delay an urgent production order for a customer
- Deenergizing would shut down life support equipment
- The worker has done this job many times
Pergunta 3 · Escolha única · 90s · 1 pt
Who may work on electric circuit parts that have not been deenergized?
- Only qualified persons
- Any trained employee
- Any supervisor on site
- Anyone with insulated tools
Pergunta 4 · Múltipla escolha · 90s · 1 pt
What must a qualified person be trained in, at a minimum? Choose the 3 correct answers.
- Distinguishing exposed live parts from other parts
- Determining the nominal voltage of exposed live parts
- The clearance distances and their voltages
- Designing a new building's wiring layout
Pergunta 5 · Verdadeiro / Falso · 90s · 1 pt
A push button or selector switch may be used as the only means of deenergizing equipment before work.
Pergunta 6 · Escolha única · 90s · 1 pt
Before deenergized equipment can be worked as deenergized, what must a qualified person do?
- Wait at least 30 minutes after switching off
- Use test equipment to verify the parts are deenergized
- Ask the operator whether the machine is off
- Check that the indicator light on the control panel has gone off
Pergunta 7 · Escolha única · 90s · 1 pt
What should happen to stored electric energy, such as in capacitors, before work?
- Nothing, it drains away by itself in time
- It is released: capacitors discharged and grounded
- It is measured and the reading written on the lockout tag
- It is left alone if the panel door is closed
Pergunta 8 · Escolha única · 90s · 1 pt
When may a lock be placed without a tag on electrical equipment?
- Whenever the job is expected to take less than one full shift
- Never: OSHA always requires both a lock and a tag
- When the worker is the only person on site that day
- One circuit, within the shift, with familiar employees
Pergunta 9 · Escolha única · 90s · 1 pt
How close may an unqualified person, or the longest conductive object they hold, come to an unguarded overhead line of 50 kV or less?
- Not closer than 3 feet
- Not closer than 6 feet
- Not closer than 10 feet
- Not closer than 20 feet
Pergunta 10 · Verdadeiro / Falso · 90s · 1 pt
Portable ladders used where they could contact exposed energized parts must have nonconductive siderails.
Pergunta 11 · Múltipla escolha · 90s · 1 pt
Which items may not be worn if they could contact exposed energized parts, unless made nonconductive? Choose the 3 correct answers.
- Rings
- Watch bands
- Metal headgear
- Cotton work gloves
Pergunta 12 · Escolha única · 90s · 1 pt
What may the working space in front of electric equipment be used for?
- Storing spare parts
- Parking pallet jacks
- Nothing but access and work
- Keeping cleaning carts and ladders
Pergunta 13 · Escolha única · 90s · 1 pt
What does OSHA say about the type of electrical safety training?
- It must be an online course with a final exam
- Classroom or on-the-job, scaled to the risk
- It must be delivered by an OSHA inspector
- One video is enough for every employee
Pergunta 14 · Escolha única · 90s · 1 pt
Where signs and barricades do not give enough warning around exposed energized parts, what must be used?
- A louder alarm bell installed on the panel
- A longer written procedure for the job
- A second lock and a tag on the main disconnect switch
- An attendant stationed to warn and protect employees